68757507617 has 4 divisors (see below), whose sum is σ = 68784980160. Its totient is φ = 68730035076.

The previous prime is 68757507593. The next prime is 68757507649. The reversal of 68757507617 is 71670575786.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 68757507617 - 2⁸ = 68757507361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68757507697) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13732517 + ... + 13737522.

It is an arithmetic number, because the mean of its divisors is an integer number (17196245040).

Almost surely, 2^68757507617 is an apocalyptic number.

It is an amenable number.

68757507617 is a deficient number, since it is larger than the sum of its proper divisors (27472543).

68757507617 is a wasteful number, since it uses less digits than its factorization.

68757507617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27472542.

The product of its (nonzero) digits is 17287200, while the sum is 59.

The spelling of 68757507617 in words is "sixty-eight billion, seven hundred fifty-seven million, five hundred seven thousand, six hundred seventeen".